/*
 * Copyright 2018 cxx
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cc.colorcat.netbird;

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/**
 * Author: cxx
 * Date: 2018-8-17
 * GitHub: https://github.com/ccolorcat
 */
final class ByteOutputStream extends FilterOutputStream {
    private long written = 0L;

    ByteOutputStream(OutputStream out) {
        super(out);
    }

    private void incCount(int value) {
        long temp = written + value;
        if (temp < 0L) {
            temp = Long.MAX_VALUE;
        }
        written = temp;
    }

    @Override
    public synchronized void write(int b) throws IOException {
        out.write(b);
        incCount(1);
    }

    @Override
    public void write(byte[] b) throws IOException {
        this.write(b, 0, b.length);
    }

    @Override
    public synchronized void write(byte[] b, int off, int len) throws IOException {
        out.write(b, off, len);
        incCount(len);
    }

    public void writeUtf8(String s) throws IOException {
        byte[] bytes = s.getBytes(Utils.UTF8);
        this.write(bytes, 0, bytes.length);
    }

    public void writeByte(char c) throws IOException {
        this.write(c);
    }

    public synchronized long size() {
        return written;
    }
}
